Safety pin



Aug. 13, 1929. w. o. HARRIS 5T A1.

SAFETY PIN Filed NOV. 23.A 192:7

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WILLIAM 0. HARRIS AND FRANK C. KHLER, 0F SAN FRANCISCO, CALIFORNIA.

SAFETY PIN.

Application led November 23, 1927. Serial No. 235,243.

Our invention relates to improvements in safety pins, and it consists of the combinations, constructions and arrangements hereinafter described and claimed.

An object of our invention is'to provide a safety pin that has novel means for positively preventing the accidental opening of the pin.

rlhis means is so constructed that the point ofV the pin becomes wedged more tightly in closed position in direct proportion to the increase of strain placed upon the point, and the pin will first break before the point can become accidentally disengaged when force alone is applied to the point.

A further object of our invention is to provide a device of the type described, that is, constructed from a single piece of wire, this Wire not only being bent for preventing` the accidental unfastening of the safety pin, but also forming a guard that prevents the cloth from moving' into the top of the pin, 'this guard also acting as a guide for causing the point to swing into proper position.

Other objects and advantages Will appear in the following specification, and the novel fea tures of the device Will be particularly pointed out in the appended claim.

Uur invention is illustrated in the accompanying drawing forming a part of this application, in which Figure 1 is a side eleva` tion of the device;

Figure 2 is a section along the line 2 2 of Figure 1; and

lligure 3 is a section along the line 3 3 of Figure 1.

In carrying out our invention, ive provide a safety pin constructed from a single piece of Wire in the following' manner: The Wire is provided With a. point 1, and an arm portion 2 that extends from the point to the spring portion 3. rllhe Wire is of resilient quality and will function in the same manner as the Wire in al standard safety pin. The tendencyv of the arm 2 When released. is to swing into the dotted line position shown in Figure 1. rlhe Wire is then fashioned into a` back 4 for the pin and a head portion 5. From the head portiou' to the point X the Wire is bent into a curve as at 6. At the point X the Wire is bent back upon itself forming a like curve 6, a head portion 5, and then the Wire is extended from the back 4 toward the curve 6to provide a guard 7. At a spaced distance from the curve 6, theV Wire is bent b ck upon itself as at 8, and then the end .is wrapped around the back e as at 9.

' the Wire formiu the The curved portions 6 are spaced from each Y upon the safety pin is on the arm 2, and is in the direction of the arrow shown in n igure 1. The tendency of the arm to boW in this direction will cause point X and tend to force the Wedge-shaped member more tightly into the Wedge-shaped recess. rEhe Wedge-shaped point than the recess 10, and therefore it cannot be forced through this recess.V In fact, the greater' the force applied on the arm 2, the greater' the Wedgin action, and the arm 2 will have to be really broken before the point 1 can be disengaged fr-om the curved portions 6.

We also provide the guard 7, Which takes the place of the standard guard, and Figure 2 shows how this guard is spaced opposite one of the curved portions 6. The point 1 when swung into the recess 12 formed by the curved portions 6, is guided by the guard, and the guard is spaced sufficiently far enough away from one of the curved portions 6 to permit the point to enter the recess 12 regardless of the fact of Whether the point is moved into the recess from one side or the other. In this way the guard acts as a guide, as Well as prevents the cloth from moving' up into the head 5. The cross-sectional shape of pin is not altered in any respect, with the exception of thepoint 1, and in this respect the Wire is flattened for providing the Wedge shaped member 11. The device is extremely simple in construction, and is thoroughlv efficient for the purpose intended.

Although We have shown and described one embodiment of our invention, it is to be understood that the same is susceptible of various changes` and We reserve the right to employ such changesas may come Within the scope ofthe appended claim.

le claim: v

A safety pin comprising a single piece of Wire having a wedge-shapecil point formed by flattening one end of the Wire-at right angles to the plane of the pin'into a relatively thin structure and a Wedge-shaped recess formed .by the Wire for receiving the point.

WILLIAM o. HARRIS. FRANK o. KoHLRR.

the arm to fulcrum about theY 11 is larger 

